Luftdatenpumpe

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- Rename OSM data field "country_name" back to "country"
- Add sanity checks for protecting against unqualified responses
from Nominatim service with DE-only dataset loaded
- Use country code for routing to different Nominatim services,
one of them having the DE-only dataset loaded
- Improve RDBMS database schema
- Naming things
- Show cardinality in sensor type chooser

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- Fix renaming OSM field "country" to "country_name"

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- Add InfluxDB egress handler
- Improve HTTP response caching
- Probe Redis before starting and croak if connection fails
- Add "geohash" field when writing into InfluxDB
- Use nominatim.hiveeyes.org as primary reverse geocoder,
fall back to nominatim.openstreetmap.org
- Add option to disable the Nominatim cache
- Add configuration and documentation about Grafana Worldmap
- Unlock CSV data acquisition from archive.luftdaten.info
- Add Grafana Graph dashboard
- Add User-Agent for requests to api.luftdaten.info
- Improve globbing when selecting path for CSV import
- Compensate empty values (nan) when importing from CSV
- Add output formatter for Grafana Worldmap Panel JSON file
- Add RDBMS database (PostgreSQL) as station data source
- Add ``--sensor-type`` filter option
- Improve CSV file reading
- Flush each 50 records when talking to InfluxDB with UDP
- Introduce quick mode for importing just the first few records
- Add new option "--create-database-view"
- Rename OSM data field "country" to "country_name"

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- Fix setup.py
- Add MANIFEST.in file

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- Use "geohash2" package from PyPI for Python3 compatibility
- Fix twine. Just works outside of virtualenv.

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- Remove unknown Trove classifiers from setup.py